What is the three filters of diesel generator and the function of diesel generator filter?

Generators have three filters like automobile engineering vehicles, which refer to the air filter element (paper filter, oil filter. Diesel filter, followed by an oil filter. If the generator is drier indoors, the dust is less, and the air filter generally does not need to be changed frequently, but the diesel filter and the machine filter should be replaced once or twice a month or twice even if the generator is not used often, or replaced before use.

The replacement of the three filters is directly related to the service life of the engine, so please replace it even if you do it.

The five oils, four filters and three waters are:

The five oils refer to engine oil, steering assist oil, gasoline, transmission fluid, and brake fluid.

The four filters refer to the oil filter, gasoline filter, and air filter.

and cabin air filters.

Trihydrate refers to glass water.

Cooling water, battery water.

Engine oil can also play a role in protecting and cooling the engine, in addition to being a sealant and rust inhibitor, the acidic substances produced by automobile power combustion are very corrosive, and this role of engine oil plays a good role in protecting the engine.

Note. Usually put the oil filter, fuel filter, air filter.

and cabin air filters, collectively known as the "four filters". They both serve as filtration, but the replacement replacement cycle is slightly different

The oil filter replacement interval is generally 5000 km.

The fuel filter replacement interval is generally 10,000 km.

The replacement interval of the air filter is generally 10,000 km.

The cabin air filter replacement interval is generally 20,000 km. Hope!

Filter out harmful impurities and moisture in the fuel system, protect the normal operation of the engine, reduce wear, avoid clogging, and improve engine life. The filter element of diesel filter is mostly made of filter paper, and some are made of felt or polymer materials. The filters are the same, with changeable and spin-on versions.

1. Original filtration efficiency characteristics.

Yanan generator tips: The filtration of diesel generator set plays the role of filtration, and it must be able to filter out a certain size and number of impurity particles during use. The diesel generator set will contain a certain number of particles of a certain size, with a certain flow rate through the filter at one time, analyze the content of impurities in the oil after filtration, the original filtration efficiency can be calculated, if a variety of specifications of particles are tested, different efficiency data can be obtained.

2. Flow resistance characteristics:

Yanan generator tips: the pressure difference between the diesel generator set before and after the filter under a certain flow rate, this pressure difference is the resistance of the filter, Li or is also the pressure loss value, and its value should be as small as possible. It is generally required that the original resistance of the full-flow filter through the rated flow rate should not be greater than 30% of the value of the kilogram cm2 or the opening pressure of the bypass.

The flow resistance characteristics of diesel generator set filters can be determined on the test bench.

There are three major filters in the diesel generator set, called the "three filters", in which the role of the diesel generator set oil filter is: the role of different types of oil filters in the lubrication system: the oil filter in the lubrication system In order to make the lubrication system oil flow unimpeded and avoid impurities scratching and brushing the surface of the parts, the oil must be strictly filtered before being sent to the friction surface.

In order to achieve the filtration effect and not increase the resistance of the oil circuit, the primary filter is generally connected in series with the main oil channel, and the secondary filter is connected in parallel with the main oil channel.

Raw filtration efficiency characteristics.

Diesel generator set filtration plays the role of filtration, and it must be able to filter out a certain size and number of impurity particles during use. The original filtration efficiency can be calculated by measuring the filtration efficiency of the new filter element, and the diesel generator set will contain a certain number of particles of a certain size through the filter at a time with a certain flow rate, and the impurity content in the filtered oil can be calculated.

Flow Resistance Characteristics:

The pressure difference between the front and rear of the filter of the diesel generator set under a certain flow rate, this pressure difference is the resistance of the filter, and it is also the pressure loss value, and its value should be as small as possible. It is generally required that the original resistance of the full-flow filter through the rated flow rate should not be greater than 30% of the value of the kilogram cm2 or the opening pressure of the bypass. The flow resistance characteristics of diesel generator set filters can be determined on the test bench.

Diesel, as the fuel of the diesel engine in the diesel generator set, must meet the fuel requirements of the diesel engine. High-pressure fuel pumps and injectors are two of the most delicate and critical components in a diesel fuel system.

The plunger and sleeve set in the high-pressure fuel pump is the heart of the high-pressure fuel pump (its structure is similar to that of a syringe for medical injections). The plunger is driven by a mechanical device and constantly reciprocates in the sleeve, continuously pressing out the fuel and sending it to the injector through the high-pressure fuel pipeline. The fuel sent to the injector is often required to reach tens of megapascals (the fuel pressure required by the design will vary depending on the type of diesel engine), and the gap between the plunger and the sleeve must be very small (only a few microns) to ensure the high pressure of the fuel output.

The needle valve coupling in the fuel injector is another delicate key component in the diesel engine fuel system. The requirement of the diesel engine for the needle valve is that it can be closed tightly before the fuel reaches the opening pressure, and the slightest leakage is not allowed; Once the opening pressure is reached, the needle valve must be opened immediately, so that the high-pressure fuel can quickly form an atomized state and be sprayed into the cylinder combustion chamber; After injection, the fuel pressure is released and the needle valve is restored to shut. In order to ensure that the needle valve can be opened and closed flexibly and reliably, the concentricity and mating clearance between the needle valve body and the needle valve core are very high.

The gap is also a few microns.

Due to the existence of these high-precision components in the fuel system of diesel engines, the cleanliness of diesel is very high. Diesel fuel is not allowed to be mixed with particulate impurities. Once the impurities mixed in diesel fuel enter these delicate couplings, the wear of the couplings will be accelerated; In the worst case, the sliding surface of the puppet will be pulled and bitten.

Immediate downtime. Therefore, before the diesel enters the high-pressure oil pump, it must pass through the diesel filter to filter out possible impurities and particles in the diesel oil, so as not to damage these delicate parts.

In a relatively complete diesel supply system, the diesel will be filtered in two stages through a primary filter and a secondary filter. (Some fine filters are also equipped with magnets inside to filter out the fine ferromagnetic substances in diesel).

In short, the purpose of setting up a diesel filter in the diesel generator set is to ensure the cleanliness of the diesel fuel entering the diesel engine, to ensure that the precision parts in the diesel engine can work reliably, and to ensure the normal operation of the unit.

The diesel generator set air filter plays an important role in the unit and needs to be replaced regularly:

The generator air filter element should be cleaned and replaced regularly according to the maintenance regulations, so as to avoid excessive dust adhesion on the filter element, resulting in increased air intake resistance, reduced engine power and increased fuel consumption. Clean the air filter element (inside and outside) every time you use it, replace the outer filter element in 1000 hours, and replace the inner filter element once every six months. If the filter element is damaged, it should be replaced promptly.

Users should also pay attention to the maintenance and maintenance of the air filter of the diesel generator set when using the diesel generator set. When installing the air filter, the sealing gasket and rubber connecting pipe should not be missing, reversed or wrongly installed, and the tightness of each press insert should be ensured. The paper dust cup air filter used, every 50-100 hours of work, to remove the dust 1 time, you can use a soft brush to brush off the surface dust, if the working time is more than 500 hours or has been damaged, it should be replaced in time.

1. Oil filter (filter element smart dust) replacement cycle.

1. The new engine starts to run for 50 hours after the first work and after the medium or overhaul.

2. After that, it is generally replaced once every 200 hours.

2. Diesel filter (filter element) replacement cycle.

1. The new engine starts to run for 50 hours after the first work and after the medium or overhaul.

2. After that, it is generally replaced once every 400 hours. If the quality of the diesel used by the user is not good, the replacement cycle should be shortened.

3. Air filter.

1. The paper filter element depends on the indicator tube of the air filter, and should be replaced immediately when the indicator turns red.

2. Due to the different air pollution degree of the operating environment of the diesel generator set, the replacement cycle of the air filter (filter element) is also different. General principle: The air filter (filter) replacement interval is 1000 hours.

This is the general principle of replacing the three considerations, but through the load test to detect the performance of the generator set, and find the problem of the generator set in time, so that the replacement of the three filters has a basis, and will not cause waste or untimely replacement and other problems.

As an important component of the silent diesel generator, the three filters play an important role in ensuring the normal operation of the generator, the three filters are oil filter, diesel filter, air filter, the following Ito generator lists the role and maintenance of the three filters of the silent diesel generator, for your reference:

First of all, let's talk about the role of the three filters of diesel generators:

1. Air filter: The function of air filter is mainly to filter impurities in the air, ensure that the air entering the cylinder is clean and meet the requirements of the air intake volume of each cylinder of the engine;

2. Diesel filter: The function of diesel filter is to filter impurities and moisture in the fuel to ensure that the fuel entering the high-pressure system of the engine is clean and meets the requirements of fuel supply;

3. Oil filter: The function of the oil filter is to filter the grinding and sufficient throughput caused by the friction between the impurities in the oil and the moving parts of the engine, so as to ensure the smooth flow of the oil and meet the lubrication requirements.

2. The influence of the three filters of the silent diesel generator on the engine performance:

1. Oil filter: The quality of the oil filter is not good, which may cause the following faults in the engine

1) Too much resistance, will reduce the amount of oil throughput, which may lead to poor engine lubrication and high oil temperature or high oil pressure;

2) The filter element is damaged, the oil enters the various moving friction surfaces without filtration, the impurities and grinding in the oil will aggravate the wear of the moving surfaces, and the long-term operation may be part of the moving surfaces (mainly bearings) grinding out of the grooves, which seriously reduces the service life of the engine.

3) If the filter element is blocked, it will cause the engine to have a shaft or "pull cylinder" failure.

2. Air filtration: If the quality of the air filter is problematic or too dirty, it will cause the following adverse effects to the engine

1) If the air filter is too dirty, the filter element parts are made of inferior raw materials, etc., resulting in insufficient air throughput, the engine will produce: insufficient power, serious black smoke discharge during load operation, and increased engine fuel consumption. But when the engine is idling, it is basically normal.

2) If the filtration effect of the air filter element is too poor or damaged, it will lead to serious early wear of the engine, which will seriously affect the service life of the engine piston ring, cylinder liner, etc.; After the piston rings and cylinder liners are seriously worn, the engine will have failures such as insufficient power, blue smoke from the exhaust, and oil burning.

3. Diesel filter: If there is a problem with the quality of the diesel filter element, the engine may have the following faults:

1) If the resistance of the filter element parts is too large, the engine will be underpowered, and the speed will be unstable when working;

2) If the filtration effect of the filter element is too poor or the filter element is broken, it may lead to the transition wear of the precision parts (such as plunger, oil outlet valve, fuel injector, etc.) in the high-pressure oil circuit system, which will also lead to insufficient engine power and unstable speed.

3. Replacement cycle of diesel generator three filters:

1. The diesel filter needs to be replaced once after 400 hours of working in the diesel generator set. The replacement cycle also needs to look at the quality of the diesel, and if the diesel quality is poor, the replacement cycle needs to be shortened.

2. The oil filter needs to be replaced once when the diesel generator set works for about 200 hours.

3. The air filter is replaced according to the display of the indicator. If the air quality in the area where the diesel generator set is used is poor, then the replacement interval of the air filter should also be shortened.